Are you absolutely sure the installation completed? This usually happens because the installation didn’t complete.
The installer prints out a running tally of stages and steps (e.g. [12/23]). If every one of them didn’t finish and produce a green check or “OK” (quotas might produce a yellow status, which is harmless), it didn’t finish and you need to figure out why, fix the problem and re-run the missed steps or reinstall. Any red steps or steps that didn’t run (e.g. the last step you see is labeled [21/23] instead of [23/23]) means something broke. Check the install log for clues.
Note the number of steps varies, depending on options and OS. But it’ll always say how many are expected.